/* 版心 */

.w {
    width: 1200px;
    margin: 10px auto;
}

body {
    background-color: #f3f5f7;
}


/*清除浮动*/

.clearfix:after,
.clearfix:before {
    content: "";
    display: table;
}

.clearfix:after {
    clear: both
}

.clearfix {
    *zoom: 1;
}


/* <!-- 头部导航栏 --> */

header {
    width: 100%;
    height: 45px;
    /* background-color: pink; */
    margin-top: 10px;
}

header a {
    float: left;
    margin-right: 65px;
}

.daohang {
    float: left;
    margin-right: 80px;
}

.daohang li {
    float: left;
    line-height: 42px;
}

.daohang li a {
    font-size: 18px;
    color: #050505;
}

.daohang li a:hover {
    /* background-color: blue; */
    border-bottom: 5px solid skyblue;
}

.serach {
    float: left;
    /* width: 410px; */
    height: 42px;
    border: 1px solid skyblue;
}

.serach input {
    float: left;
    height: 100%;
}

.serach button {
    float: left;
    width: 50px;
    height: 100%;
    background: skyblue url(../images/btn.png) no-repeat center center;
    border: 0;
}

.user {
    float: right;
    width: 150px;
    height: 42px;
    line-height: 42px;
}

.user a {
    width: 100%;
    height: 100%;
}

.user a img {
    vertical-align: middle;
}


/* <!-- banner模块 --> */

.banner-big {
    width: 100%;
    background-color: #1c036c;
    height: 422px;
}

.banner {
    /* background-color: pink; */
    height: 100%;
    background: url(../images/banner2.png);
}

.left-banner {
    float: left;
    height: 100%;
    width: 190px;
    background-color: #13024b;
}

.left-banner ul {
    width: 100%;
    padding-top: 10px;
}

.left-banner ul li {
    height: 44px;
    line-height: 44px;
    padding-left: 20px;
}

.left-banner ul li:hover {
    background-color: skyblue;
}

.left-banner ul li a {
    color: #fff;
    font-size: 14px;
}

.left-banner ul li a span {
    float: right;
    margin-right: 15px;
}

.right-banner {
    float: right;
    margin-top: 50px;
    width: 230px;
    height: 300px;
    background-color: #fff;
}

.leason {
    height: 48px;
    line-height: 48px;
    text-align: center;
    background-color: #9bceea;
}

.leason h3 {
    font-size: 18px;
    color: #fff;
}

.leason-list ul {
    margin: 10px 10px 7px 17px;
}

.leason-list ul li {
    height: 63px;
    padding-top: 10px;
    border-bottom: 1px solid #efefef;
}

.leason-list ul li a h4 {
    font-size: 16px;
    color: #050505;
}

.leason-list ul li a p {
    font-size: 14px;
    color: #bdbdbd;
}

.allleason {
    margin: 0 auto;
    width: 200px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border: 2px solid #22b0ff;
}

.allleason a {
    font-size: 16px;
    color: #00a4ff;
}


/* <!-- 精品导航推荐 --> */

.jingpintuijian-small {
    height: 60px;
    /* background-color: pink; */
    border: 1px solid #ccc;
    box-shadow: 2px 3px 2px #dcdee0;
}

.xiaobiaoti {
    float: left;
    height: 60px;
    width: 130px;
    line-height: 60px;
    padding-left: 35px;
}

.xiaobiaoti h3 {
    font-size: 16px;
    color: #00a4ff;
}

.jingpintuijian-small ul {
    float: left;
    height: 100%;
}

.jingpintuijian-small ul li {
    float: left;
    height: 60px;
    line-height: 60px;
    margin-left: 30px;
}

.jingpintuijian-small ul li:nth-child(2n+1) {
    width: 2px;
    height: 17px;
    background-color: pink;
    margin-top: 24px;
}

.jingpintuijian-small ul li a {
    font-size: 16px;
    color: #000;
}

.inter {
    float: right;
    height: 60px;
    line-height: 60px;
}

.inter a {
    font-size: 12px;
    color: #00a4ff;
}


/* 精品推荐 */

.nav {}

.nav-bh {
    width: 100%;
    height: 40px;
    line-height: 40px;
}

.nav-bh h3 {
    float: left;
    font-size: 20px;
    color: #494949;
}

.nav-bh p {
    float: right;
    font-size: 14px;
    color: #a5a5a5;
}

.nav-bd ul li {
    float: left;
    width: 228px;
    height: 271px;
    background-color: #ffffff;
    margin-right: 15px;
}

.nav-bd ul li img {
    width: 100%;
}

.nav-bd ul li:nth-child(5) {
    margin-right: 0;
}

.nav-bd ul li:nth-child(10) {
    margin-right: 0;
}

.nav-bd ul li h4 {
    color: #000;
    font-size: 14px;
    margin: 20px 17px 15px 25px;
}

.nav-bd ul li p {
    margin: 0 17px 15px 25px;
    font-size: 12px;
    color: #999999;
}

.nav-bd ul li p span {
    color: #ff7c2d;
}


/* <!-- 编程入门 --> */

.bianchengrumen-bh {
    height: 38px;
    line-height: 38px;
}

.bianchengrumen-bh h3 {
    float: left;
    font-size: 20px;
    color: #494949;
}

.bianchengrumen-bh ul {
    float: left;
    margin-left: 300px;
}

.bianchengrumen-bh ul li {
    float: left;
    font-size: 16px;
    margin-right: 70px;
}

.bianchengrumen-bh ul li:nth-child(1) {
    color: #00a4ff;
}

.bianchengrumen-bh p {
    float: right;
}

.bianchengrumen-bd {
    /* height: 398px; */
}

.bianchengrumen-bd-left {
    float: left;
}

.bianchengrumen-bd-right {
    float: right;
}

.bianchengrumen-bd-right ul {
    margin-top: 25px;
}

.bianchengrumen-bd-right ul li {
    float: left;
    width: 228px;
    height: 271px;
    background-color: #ffffff;
    margin-right: 15px;
}

.bianchengrumen-bd-right ul li:nth-child(4) {
    margin-right: 0;
}

.bianchengrumen-bd-right ul li img {
    width: 100%;
}

.bianchengrumen-bd-right ul li h4 {
    color: #000;
    font-size: 14px;
    margin: 20px 17px 15px 25px;
}

.bianchengrumen-bd-right ul li p {
    margin: 0 17px 15px 25px;
    font-size: 12px;
    color: #999999;
}

.bianchengrumen-bd-right ul li p span {
    color: #ff7c2d;
}


/* <!-- 底部 --> */

footer {
    background-color: #ffffff;
}

.left {
    float: left;
    margin-left: 20px;
}

.left img {
    margin-top: 30px;
}

.left p {
    font-size: 12px;
    color: #666666;
    margin: 22px 0;
}

.left button {
    width: 120px;
    height: 35px;
    border: 1px solid #00a4ff;
}

.right {
    float: right;
    margin-top: 30px;
}

.right dl {
    float: left;
}

.right dl {
    margin-left: 145px;
    font-size: 16px;
    color: #333333;
}

.right dd {
    font-size: 12px;
    color: #333333;
}